Method of forming crank-shafts.



gna

formi.

` is known tha .1 MomEmvEL-L, z. ciizeu 0f mmica, residing at ofG-Qnesee mid Siae'o' veniei serzliu new menig in ia/Ithods 0i 01min@Smink- Sha's, 0?' which h oiiowing is z specification, I'serencebeinghad therein to @the accfmpanying dmwiiigs.

The invention relates to ih@ proce-ss 0f far-ging crank-shafts and c@mprises ille nofe. meid folming a muitiple Crank-shaft,

in whim. the cranks exeiid in n plurali@ of planes.

En me rzuvings: cirfmes 2, 3, 4; @mi 5 simw the succesi n ig put uwimpl-mod privee/QQ', n A of a length Shgiitiy Cmnk HQW porions B ami. Badjacent to 1 thm at iie sommation ibis second op- @ranged in f Qiafzioniii@ @Yanks There are :Liso baar?- ibis second opevfiiou the surplusmem? squeezed @uit from the dies w iii form a fin E, :mei tiv ixmic isthai-Piove next vngagcd wih 2L tzimn'iing die which removes; ihis iin.After the trmmmig Opm-mimi Mw ,tions to *fm-m 0i? ih@ Hank, nii of fini@tnc'wsume piane? smiulmiww sly y" mg they thrmvs m @zieh of i SHS im),bi

throws in n still tlilferent` plne, removing the blank from the dies andtrin'irnimg,T from the seme the n of surplus metal, and're turifi'ig'the blfinl;` to the dies for 'the les@4 forming operation to restorethe true shapetheretoh The process of forging crank-shafts comprisingdie-forging the blank to form therein n pair of non-adjacent doublethrmfvs7 all of the throws being in the sinne plane und with e iortionat one end of 'the blank of greater lenzgfthy than :it the other,f-nibjecting the blank to a secend die-forging operation for bending thethrows into ditferent radial planes and while engaged with the (liesstretching the intermediate metal to forni additional throws in a. stilltlifei-,

ent pinne, removing the blank from the dies and, trimming tln sanne toreinovethe fin of surplus metal, ie'txrning the blank to the dies forthe last .forming operation to regermen store the true shape thereto,und upsetting the end of greater length to form :t flange couplingthereon.

6. The process of forging crank-shafts comprising simultaneouslydie-forging nonadjacent throws in the Same plane, enicl throws beingunequally spaced from the crankshaft extremity, re-fashioning seidthrows to bend the saine into different planes, and simultaneouslystretchingI und fnshioning the metal intermediate the reashioned throwsto forni one or more additional throws in u different plane, andupsetting the end portion 0f greater length to fornil a flanged couplingthereon.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER A. MOTHERWELL.. Witnesses A. D, PULVER, D. R. MGLAIN.

